print("hello world")

class Person(object):
    def __init__(self,name):
        self.name = name

    def __str__(self):
        return "%s此人很牛逼"%self.name

    def run(self):
        print("%s在跑步"%self.name)

    def sing(self):
        print("%s还会唱歌"%self.name)
    
    def eat(self):
        print("%s还会吃"%self.name)

    def __del__(self):
        print("对象销毁了")


